JP2012096944A - Woody cement board and method for manufacturing the same - Google Patents
Woody cement board and method for manufacturing the same Download PDFInfo
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- JP2012096944A JP2012096944A JP2010244291A JP2010244291A JP2012096944A JP 2012096944 A JP2012096944 A JP 2012096944A JP 2010244291 A JP2010244291 A JP 2010244291A JP 2010244291 A JP2010244291 A JP 2010244291A JP 2012096944 A JP2012096944 A JP 2012096944A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
Description
本発明は、建築板に好適な木質セメント板、及びその製造方法に関するものである。 The present invention relates to a wood cement board suitable for a building board and a manufacturing method thereof.
従来から、セメント等の水硬性無機粉体と、木質パルプ繊維などの木質繊維とを主成分とする木質セメント板があり、該木質セメント板は比重が高く、曲げ強度などの物性に優れるので、内壁材、外壁材等の建築板として使用されている。そして、このような木質セメント板の製造方法としては、ハチェック式や長網式などの抄造方法、型枠プレス方式、乾式法がある。また、特許文献１に記載されているように、型枠にスラリーを流し込み、均し、脱水して得られたマットの上に、粉体原料を散布して表層を形成させ、得られたマットをプレス成型する方式もある。特許文献１の製造方法によれば、必要量のスラリーを型枠に投入すれば良いため、厚物の木質セメント板を製造しやすい。また、表面が粉体原料により形成されるので、表面が緻密となる。 Conventionally, there is a wood cement board mainly composed of hydraulic inorganic powder such as cement and wood fiber such as wood pulp fiber, and the wood cement board has high specific gravity and excellent physical properties such as bending strength. It is used as a building board for inner and outer wall materials. And as a manufacturing method of such a wood cement board, there exist papermaking methods, such as a Hatschek type and a long net type, a formwork press method, and a dry method. In addition, as described in Patent Document 1, a slurry is poured into a mold, leveled, and dewatered on a mat obtained by spraying powder raw materials to form a surface layer. There is also a method of press molding. According to the manufacturing method of Patent Document 1, a thick wooden cement board can be easily manufactured because a necessary amount of slurry may be put into a mold. Moreover, since the surface is formed of a powder raw material, the surface becomes dense.
木質セメント板には、表面に深い凹凸模様を設けて意匠性を向上させることが求められており、特許文献１によれば、表面が緻密なので、表面に深い凹凸模様を設けることができる。 The wood cement board is required to be provided with a deep concavo-convex pattern on the surface to improve the design. According to Patent Document 1, since the surface is dense, it is possible to provide a deep concavo-convex pattern on the surface.
しかし、表面に深い凹凸模様を設けると、凹凸模様の縁角部や深い曲がり部分に亀裂が発生し、強度が弱くなったり、長期を経過した際に反りが発生しやすい。 However, when a deep concavo-convex pattern is provided on the surface, cracks occur at the corners and deep bends of the concavo-convex pattern, and the strength becomes weak, and warping tends to occur when a long period of time has passed.
したがって、本発明の課題は、表面の意匠性と、曲げ強度と、長期耐久性に優れる木質セメント板、及びその製造方法を提供するものである。 Therefore, the subject of this invention is providing the wood cement board which is excellent in the design property of a surface, bending strength, and long-term durability, and its manufacturing method.
本発明は、表面に凹凸模様を有する木質セメント板を提供する。本発明の木質セメント板は、セメントと、珪酸含有物質と、木質繊維とからなる母層の上に、セメントと、珪酸含有物質と、木質繊維と、木粉とからなる表層が積層した成型物であり、該母層と該表層には、セメントと珪酸含有物が３：７〜７：３の質量比で含有されている。そして、該表層の木粉は、０．３〜１．５mmで、カルシウムにより被覆されている。また、該木質繊維と該木粉とをあわせた含有量は、該木質セメント板の全固形分に対して９質量％以下である。該木粉の含有量は、該表層の全固形分に対して１〜３質量％であることが好ましく、更に好ましくは、該表層の全固形分に対して１〜２質量％である。更に、表層と母層の固形分は、５：９５〜３０：７０の質量比であることが好ましい。
また、本発明では、表面に凹凸模様を有する木質セメント板を製造する方法も提供する。該製造方法は、水に、セメントと、珪酸含有物質と、木質繊維を添加し、混合して、母層用スラリーを製造する工程と、得られた母層用スラリーを脱水し、母層マットを製造する工程と、木粉をカルシウムで被覆する工程と、得られた木粉と、セメントと、珪酸含有物と、木質繊維を混合して表層用原料混合物を製造する工程と、得られた表層用原料混合物を母層マットに散布し、成型、養生する工程とからなる。母層用スラリーを製造する工程においては、該母層用スラリーにおけるセメントと珪酸含有物の質量比を３：７〜７：３とするとともに、木質繊維の量を該母層用スラリーの全固形分に対して９質量％以下とする。表層用原料混合物を製造する工程においては、該表層用原料混合物におけるセメントと珪酸含有物の質量比を３：７〜７：３とするとともに、木質繊維と木粉とをあわせた量を該表層用原料混合物の全固形分に対して９質量％以下とする。木粉をカルシウムで被覆する工程は、木粉とセメント組成物の粉砕物を固形分濃度７５〜９０質量％の状態で混合することにより行う、又は、木粉とカルシウム含有物を固形分濃度７５〜９０質量％の状態で混合することにより行う。なお、木粉をカルシウムで被覆する工程においては、０．３〜１．５mmの木粉を使用する。また、カルシウム含有物は、セメント、石膏、石灰、カルシウムを含有する珪酸含有物のすくなくともいずれかである。更に、木粉をカルシウムで被覆する工程において、該木粉と、セメント組成物の質量比を１：７〜１：２０とする、又は、カルシウム含有物を該木粉よりも多く添加することが好ましい。更に、木粉と、セメント組成物、又は、カルシウム含有物の混合は６０秒以上行うことが好ましい。該木粉の量は、表層用原料混合物の全固形分に対して１〜３質量％とすることが好ましく、更に好ましくは、１〜２質量％とすることである。更に、表層用原料混合物と母層用スラリーの固形分は、５：９５〜３０：７０の質量比であることが好ましい。
The present invention provides a wood cement board having an uneven pattern on the surface. The wood cement board of the present invention is a molded product in which a surface layer composed of cement, a silicic acid-containing material, a wood fiber, and wood powder is laminated on a base layer composed of cement, a silicic acid-containing material, and a wood fiber. The cement layer and the silicic acid-containing material are contained in the mother layer and the surface layer in a mass ratio of 3: 7 to 7: 3. And this surface layer wood flour is 0.3-1.5mm, and is coat | covered with calcium. Moreover, content which combined this wood fiber and this wood powder is 9 mass% or less with respect to the total solid of this wood cement board. The content of the wood flour is preferably 1 to 3% by mass with respect to the total solid content of the surface layer, and more preferably 1 to 2% by mass with respect to the total solid content of the surface layer. Furthermore, it is preferable that solid content of a surface layer and a mother layer is mass ratio of 5: 95-30: 70.
Moreover, in this invention, the method of manufacturing the wooden cement board which has an uneven | corrugated pattern on the surface is also provided. The manufacturing method includes a step of adding a cement, a silicic acid-containing substance, and a wood fiber to water and mixing them to produce a mother layer slurry, and dehydrating the obtained mother layer slurry to form a mother layer mat. A step of coating the wood flour with calcium, a step of producing a raw material mixture for the surface layer by mixing the obtained wood flour, cement, silicic acid-containing material, and wood fiber, and It consists of a process of spraying a surface layer raw material mixture on a mother layer mat, molding and curing. In the step of producing the mother layer slurry, the mass ratio of the cement and the silicic acid-containing material in the mother layer slurry is set to 3: 7 to 7: 3, and the amount of the wood fiber is set to the total solid of the mother layer slurry. 9 mass% or less with respect to the minute. In the step of producing the raw material mixture for the surface layer, the mass ratio of the cement and the silicic acid-containing material in the raw material mixture for the surface layer is set to 3: 7 to 7: 3, and the total amount of the wood fiber and the wood flour is added to the surface layer. 9 mass% or less based on the total solid content of the raw material mixture. The step of coating the wood powder with calcium is performed by mixing the pulverized product of the wood powder and the cement composition at a solid content of 75 to 90% by mass, or the solid content of the wood powder and the calcium-containing material is 75. It mixes by the state of -90 mass%. In addition, in the process which coat | covers wood powder with calcium, 0.3-1.5 mm wood powder is used. The calcium-containing material is at least one of cement, gypsum, lime, and a silicic acid-containing material containing calcium. Furthermore, in the step of coating the wood powder with calcium, the mass ratio of the wood powder to the cement composition may be 1: 7 to 1:20, or the calcium content may be added more than the wood powder. preferable. Furthermore, it is preferable to mix the wood flour, the cement composition, or the calcium-containing material for 60 seconds or more. The amount of the wood flour is preferably 1 to 3% by mass, and more preferably 1 to 2% by mass, based on the total solid content of the raw material mixture for the surface layer. Further, the solid content of the raw material mixture for the surface layer and the slurry for the mother layer is preferably a mass ratio of 5:95 to 30:70.
本発明によれば、表面の意匠性と、曲げ強度と、長期耐久性に優れる木質セメント板、及びその製造方法を提供することができる。 According to the present invention, it is possible to provide a wood cement board excellent in surface design, bending strength, and long-term durability, and a method for producing the same.
以下、本発明の実施の形態を具体的に説明する。 Hereinafter, embodiments of the present invention will be specifically described.
本発明の木質セメント板は、セメントと、珪酸含有物質と、木質繊維とからなる母層の上に、セメントと、珪酸含有物質と、木質繊維と、木粉とからなる表層が積層した成型物である。 The wood cement board of the present invention is a molded product in which a surface layer composed of cement, a silicic acid-containing material, a wood fiber, and wood powder is laminated on a base layer composed of cement, a silicic acid-containing material, and a wood fiber. It is.
セメントとしては、ポルトランドセメント、早強セメント、アルミナセメント、フライアッシュセメント、高炉スラグセメント、シリカセメント、白色セメント等がある。本発明では、これらの物質のうち、いずれか１種のみを含有しても良いし、２種類以上を含有してもよい。 Examples of the cement include Portland cement, early strength cement, alumina cement, fly ash cement, blast furnace slag cement, silica cement, and white cement. In the present invention, any one of these substances may be contained, or two or more kinds may be contained.
珪酸含有物としては、珪砂、珪石粉、シリカ粉、シリカフューム、フライアッシュ、高炉スラグ、シラスバルーン、パーライト、珪藻土等がある。本発明では、これらの物質のうち、いずれか１種のみを含有しても良いし、２種類以上を含有してもよい。 Examples of the silicic acid-containing material include silica sand, silica powder, silica powder, silica fume, fly ash, blast furnace slag, shirasu balloon, pearlite, diatomaceous earth, and the like. In the present invention, any one of these substances may be contained, or two or more kinds may be contained.
木質繊維としては、故紙、針葉樹未晒しクラフトパルプ（ＮＵＫＰ）や針葉樹晒しクラフトパルプ（ＮＢＫＰ）、広葉樹未晒しクラフトパルプ（ＬＵＫＰ）、広葉樹晒しクラフトパルプ（ＬＢＫＰ）等がある。本発明では、これらの物質のうち、いずれか１種のみを含有しても良いし、２種類以上を含有してもよい。また、ディスクリファイナー等の叩解機で叩解してカナディアンフリーネス５００ｍｌ以下にした木質繊維を用いると、強度などの物性が向上するので、好ましい。 Examples of the wood fiber include waste paper, softwood unbleached kraft pulp (NUKP), softwood bleached kraft pulp (NBKP), hardwood unbleached kraft pulp (LUKP), and hardwood bleached kraft pulp (LBKP). In the present invention, any one of these substances may be contained, or two or more kinds may be contained. In addition, it is preferable to use wood fibers beaten with a beater such as a disc refiner to have a Canadian freeness of 500 ml or less because physical properties such as strength are improved.
木粉は、０．３〜１．５mmのサイズである。木粉は、森林から伐採した木材を粉砕して製造することができるが、間伐材や、柱材の製造で発生する端材、木材の廃材等を粉砕することにより製造することもできる。 Wood flour has a size of 0.3 to 1.5 mm. Wood flour can be produced by pulverizing timber harvested from a forest, but it can also be produced by pulverizing thinned timber, offcuts generated in the production of pillars, wood waste, and the like.
本発明では、原料の一つとして、セメント組成物も使用することができる。セメント組成物としては、製造工程で発生した硬化前の木質セメント板の不良板、硬化後の木質セメント板の不良板、建築現場で発生した木質セメント板の端材、廃材などがある。いずれも衝撃式粉砕機及び／又は擦過式粉砕機で平均粒径５０〜１５０μｍに粉砕し、使用する。該セメント組成物を使用することで、製造コストを安くすることができるとともに、産業廃棄物を減らすことができる。 In the present invention, a cement composition can also be used as one of the raw materials. Examples of the cement composition include a defective wood cement board before curing, a defective wood cement board after curing, a wood cement board scrap generated at a construction site, and a waste material. In either case, the powder is pulverized to an average particle size of 50 to 150 μm with an impact pulverizer and / or a rubbing pulverizer. By using the cement composition, the manufacturing cost can be reduced and industrial waste can be reduced.
更に、本発明では、原料の一つとして、カルシウム含有物も使用することができる。カルシウム含有物としては、セメント、石膏、石灰、カルシウムを含有する珪酸含有物のすくなくともいずれかである。カルシウムを含有する珪酸含有物としては、前述した珪酸含有物の内、フライアッシュ、高炉スラグなどがあげられる。 Furthermore, in the present invention, a calcium-containing material can also be used as one of the raw materials. The calcium-containing material is at least one of a silicic acid-containing material containing cement, gypsum, lime and calcium. Examples of the silicic acid-containing material containing calcium include fly ash and blast furnace slag among the above-mentioned silicic acid-containing materials.
木質セメント板の上記以外の原料として、塩化カルシウム、塩化マグネシウム、硫酸カリウム、硫酸カルシウム、硫酸マグネシウム、硫酸アルミニウム、アルミン酸ナトリウム、アルミン酸カリウム、蟻酸カルシウム、酢酸カルシウム、アクリル酸カルシウム、水ガラス等の硬化促進剤や、マイカ、ベントナイト、バーミキュライト等の鉱物粉末や、ロウ、ワックス、パラフィン、シリコン、コハク酸、高級脂肪酸の金属塩等の防水剤、撥水剤や、発泡性熱可塑性プラスチックビーズ、プラスチック発泡体等や、ナイロン、ポリビニルアルコール繊維、ポリエステル繊維、ポリプロピレン繊維、アクリル繊維、ポリウレタン繊維、ガラス繊維などの化学繊維や、ポリビニルアルコール、カルボキシメチルセルロースなどの水性糊料、スチレン−ブタジエンラテックス、アクリル樹脂エマルジョンなどの合成樹脂エマルジョンの強化剤がある。 Other raw materials for wood cement boards include calcium chloride, magnesium chloride, potassium sulfate, calcium sulfate, magnesium sulfate, aluminum sulfate, sodium aluminate, potassium aluminate, calcium formate, calcium acetate, calcium acrylate, water glass, etc. Hardening accelerators, mineral powders such as mica, bentonite, vermiculite, waterproofing agents such as wax, wax, paraffin, silicon, succinic acid, metal salts of higher fatty acids, water repellents, foaming thermoplastic beads, plastic Foam, etc., nylon, polyvinyl alcohol fiber, polyester fiber, polypropylene fiber, acrylic fiber, polyurethane fiber, glass fiber and other chemical fibers, polyvinyl alcohol, carboxymethyl cellulose and other aqueous pastes, styrene Butadiene latex, a reinforcing agent of the synthetic resin emulsion such as an acrylic resin emulsion.
そして、本発明の木質セメント板は、母層と表層からなるが、母層、表層ともにセメントと珪酸含有物を３：７〜７：３の質量比で含有し、母層は木質繊維を９質量％以下、表層は木質繊維と木粉とをあわせて９質量％以下含有する。
母層、表層ともにセメントと珪酸含有物を質量比で３：７〜７：３の範囲で含有するのは、この範囲であれば、木質セメント板は十分な強度を発現できるとともに、十分なたわみも得られ、作業性、釘打ち性等にも問題が発生しないからである。この範囲から外れると、木質セメント板は強度を発現できず脆くなる、又は、比重が高くなるとともにたわみが少なくなり、堅くて重く、運搬しづらく、作業性、釘打ち性等に問題が発生する。
母層が木質繊維を９質量％以下含有するのは、９質量％より多いと、木質セメント板が十分な強度を発現できないためである。
表層が木質繊維と木粉とをあわせて９質量％以下含有するのは、９質量％より多いと、プレスした際に、表面を十分に成形することができず、凹凸模様の縁角部や深い曲がり部分に亀裂が発生しやすいためである。木質繊維が４〜８質量％、木粉が１〜３質量％であると、得られる木質セメント板は、強度等の物性や表面の意匠性に特に優れるので好ましい。特に、木粉が、該表層の全固形分に対して１〜２質量％であることが好ましい。
The wood cement board of the present invention comprises a mother layer and a surface layer. Both the mother layer and the surface layer contain cement and silicic acid-containing material in a mass ratio of 3: 7 to 7: 3, and the mother layer contains wood fibers. The surface layer contains 9% by mass or less of the wood fiber and the wood flour together.
It is within this range that the cement layer and silicic acid-containing material are contained in a mass ratio of 3: 7 to 7: 3 in both the mother layer and the surface layer, and within this range, the wooden cement board can exhibit sufficient strength and has sufficient deflection This is because there is no problem in workability, nailing and the like. If it is out of this range, the wood cement board will not be able to express its strength and will become brittle, or the specific gravity will increase and the deflection will be reduced, and it will be hard and heavy, difficult to carry, and will cause problems in workability, nailing, etc. .
The reason why the mother layer contains 9% by mass or less of the wood fiber is that if it exceeds 9% by mass, the wood cement board cannot exhibit sufficient strength.
If the surface layer contains 9% by mass or less of the wood fiber and the wood powder, if the content is more than 9% by mass, the surface cannot be sufficiently formed when pressed, This is because cracks are likely to occur at deep bends. When the wood fiber is 4 to 8% by mass and the wood powder is 1 to 3% by mass, the obtained wood cement board is particularly excellent in physical properties such as strength and surface design, which is preferable. In particular, the wood flour is preferably 1 to 2% by mass with respect to the total solid content of the surface layer.
そして、本発明では、製造方法は、水に、セメントと、珪酸含有物質と、木質繊維を添加し、混合して、母層用スラリーを製造する工程と、得られたスラリーを脱水し、母層マットを製造する工程と、木粉をカルシウムで被覆する工程と、得られた木粉と、セメントと、珪酸含有物と、木質繊維を混合して表層用原料混合物を製造する工程と、得られた表層用原料混合物を母層マットに散布し、成型、養生する工程とからなる。 In the present invention, the production method comprises adding a cement, a silicic acid-containing substance, and a wood fiber to water and mixing them to produce a mother layer slurry, dehydrating the obtained slurry, A step of producing a layer mat, a step of coating wood powder with calcium, a step of producing a raw material mixture for a surface layer by mixing the obtained wood powder, cement, silicic acid-containing material, and wood fiber, and obtaining The surface layer raw material mixture thus obtained is sprayed on a mother layer mat, and is molded and cured.
まず、母層用スラリーを製造する工程は、水に、セメントと、珪酸含有物質と、木質繊維を添加し、混合することにより行うが、セメントと、珪酸含有物と、木質繊維は、粉体（乾燥）状態で添加しても良いし、予め各原料を別の水に混合しておいてから添加しても良いが、母層用スラリーの固形分濃度が２０〜４０質量％となるように調整する。スラリーの固形分濃度を２０質量％以上とするのは、２０質量％より少ないとスラリーを脱水する際に時間がかかり、脱水された抄造シートに亀裂が入りやすく、抄造しにくいなどの問題が発生するためである。スラリーの固形分濃度を４０質量％以下とするのは、４０質量％より多いとスラリーの流動性が悪くなり、脱水された抄造シートに亀裂が入りやすく、抄造しにくいなどの問題が発生するためである。 First, the process for producing the slurry for the mother layer is performed by adding and mixing cement, silicic acid-containing material, and wood fiber to water. The cement, silicic acid-containing material, and wood fiber are powdered. It may be added in a (dry) state or may be added after mixing each raw material in separate water in advance, but the solid content concentration of the slurry for the mother layer will be 20 to 40% by mass Adjust to. The reason why the solid content concentration of the slurry is 20% by mass or more is that if it is less than 20% by mass, it takes time to dehydrate the slurry, and the dehydrated paper sheet is prone to cracking and difficult to produce. It is to do. The reason why the solid content concentration of the slurry is set to 40% by mass or less is that when it exceeds 40% by mass, the fluidity of the slurry is deteriorated, and the dewatered paper sheet is easily cracked and difficult to make. It is.
そして、得られたスラリーを脱水し、母層マットを製造する工程は、得られたスラリーを、下側に吸引脱水装置を備えた型枠内に流し込み、下側側から吸引脱水して、スラリーを水と固形物に分離することにより行う。 Then, the step of dehydrating the obtained slurry and producing the mother layer mat is performed by pouring the obtained slurry into a mold having a suction dewatering device on the lower side, suction dehydrating from the lower side, Is separated into water and solids.
木粉をカルシウムで被覆する工程は、木粉とセメント組成物の粉砕物を固形分濃度７５〜９０質量％の状態で混合することにより行う、又は、木粉とカルシウム含有物を固形分濃度７５〜９０質量％の状態で混合することにより行う。木粉とセメント組成物の粉砕物を混合する際の固形分濃度７５〜９０質量％、木粉とカルシウム含有物を混合する際の固形分濃度７５〜９０質量％とするのは、この状態が木粉をカルシウムで被覆させるのに適切であり、かつ、作業しやすいためである。すなわち、セメント組成物及びカルシウム含有物は、カルシウムを含有しているが、該カルシウムは水に可溶であり、木粉は、比重が軽く、乾燥状態では、セメント組成物又はセメントと混合しにくいが、適度な水を有することにより、セメント組成物又はカルシウム含有物との混合が可能となる。そこで、本発明では、木粉をセメント組成物又はカルシウム含有物と固形分濃度７５〜９０質量％の状態で混合することにより、セメント組成物又はカルシウム含有物からカルシウムを溶出させるとと共に、均一に混合させて、木粉をカルシウムで被覆させている。なお、固形分濃度が７５質量％より低いと、混合の際に木粉が混合機の壁面に付着し、均一に混合できないとともに、表層用原料混合物の含水率が高くなり、均一に散布できない。一方、固形分濃度が９０質量％を超えると、木粉とセメント組成物又はカルシウム含有物を均一に混合できないとともに、セメント組成物又はカルシウム含有物からのカルシウムの溶出も十分にできず、木粉をカルシウムで十分に被覆することができない。なお、木粉をカルシウムで被覆する工程において、固形分濃度の調整を、母層用スラリーを脱水した際に得られた水で行うと、木粉をカルシウムで被覆しやすくなるので、好ましい。
そして、木粉は、いずれの場合でも０．３〜１．５mmの大きさのものを使用する。０．３〜１．５mmの大きさの木粉を使用するのは、この範囲から外れると、得られる木質セメント板は、十分な物性や、表面の造形性を得られないためである。
木粉の量は、表層の全固形分に対して、木質繊維とあわせて９質量％以下とするが、１〜３質量％とすることが好ましく、更に１〜２質量％とすることがより好ましい。
また、木粉をカルシウムで被覆する工程を、木粉とセメント組成物の粉砕物を混合することにより行う場合には、該木粉と、該セメント組成物の質量比が１：７〜１：２０であると、該木粉がカルシウムに覆われやすいとともに、得られる木質セメント板は十分な強度を得られるので、好ましい。木粉をカルシウムで被覆する工程を、木粉とカルシウム含有物を混合することにより行う場合には、該カルシウム含有物の量を該木粉の量よりも多くすると、該木粉がカルシウムに覆われやすいとともに、得られる木質セメント板は、十分な強度を得られるので、好ましい。
更に、木粉と、セメント組成物、又は、カルシウム含有物との混合を６０秒以上行うと、該木粉が確実にカルシウムにより被覆されるので、好ましい。なお、木粉と、セメント組成物、又は、カルシウム含有物の混合の順番は、木粉を先に添加しても良いし、木粉を後に添加しても良い。
The step of coating the wood powder with calcium is performed by mixing the pulverized product of the wood powder and the cement composition at a solid content of 75 to 90% by mass, or the solid content of the wood powder and the calcium-containing material is 75. It mixes by the state of -90 mass%. The solid content concentration of 75 to 90% by mass when mixing the wood powder and the pulverized cement composition, and the solid content concentration of 75 to 90% by mass when mixing the wood powder and calcium-containing material is this state. This is because it is suitable for covering wood powder with calcium and is easy to work. That is, the cement composition and the calcium-containing material contain calcium, but the calcium is soluble in water, and the wood flour has a low specific gravity and is difficult to mix with the cement composition or cement in a dry state. However, mixing with a cement composition or a calcium-containing material becomes possible by having appropriate water. Therefore, in the present invention, the wood powder is mixed with the cement composition or the calcium-containing material in a solid content concentration of 75 to 90% by mass, so that calcium is eluted from the cement composition or the calcium-containing material and uniformly. Mix and coat the wood flour with calcium. When the solid content concentration is lower than 75% by mass, the wood powder adheres to the wall surface of the mixer during mixing and cannot be uniformly mixed, and the moisture content of the raw material mixture for the surface layer becomes high and cannot be uniformly dispersed. On the other hand, when the solid content concentration exceeds 90% by mass, the wood powder and the cement composition or the calcium-containing material cannot be mixed uniformly, and the calcium elution from the cement composition or the calcium-containing material cannot be sufficiently performed. Cannot be sufficiently coated with calcium. In the step of coating the wood powder with calcium, it is preferable to adjust the solid concentration with water obtained when the slurry for the mother layer is dehydrated because the wood powder is easily covered with calcium.
And in any case, the wood powder having a size of 0.3 to 1.5 mm is used. The reason why the wood powder having a size of 0.3 to 1.5 mm is used is that if the wood cement board is out of this range, the obtained wood cement board cannot obtain sufficient physical properties and surface formability.
The amount of the wood flour is 9% by mass or less, together with the wood fiber, based on the total solid content of the surface layer, but is preferably 1 to 3% by mass, and more preferably 1 to 2% by mass. preferable.
Moreover, when performing the process of coat | covering wood powder with calcium by mixing wood powder and the ground material of a cement composition, mass ratio of this wood powder and this cement composition is 1: 7-1 :. When it is 20, the wood powder is easily covered with calcium, and the obtained wood cement board is preferable because sufficient strength can be obtained. When the step of coating the wood powder with calcium is performed by mixing the wood powder and the calcium-containing material, if the amount of the calcium-containing material is larger than the amount of the wood powder, the wood powder is covered with calcium. The wood cement board obtained is preferable because it is easily broken and sufficient strength can be obtained.
Furthermore, it is preferable to mix the wood powder with the cement composition or the calcium-containing material for 60 seconds or more because the wood powder is surely covered with calcium. In addition, the order of mixing wood powder, a cement composition, or a calcium containing material may add wood powder first, and may add wood powder later.
そして、表層用原料混合物を製造する工程は、得られた木粉と、セメントと、珪酸含有物と、木質繊維を混合することにより行う。セメントと、珪酸含有物と、木質繊維は、粉体（乾燥）状態で添加しても良いし、水を含んだ状態で添加しても良いが、表層用原料混合物の固形分濃度が７１〜９０質量％となるように調整する。表層用原料混合物の固形分濃度を９０質量％以下とするのは、９０質量％より多いと各原料が均一に混合しにくいとともに、散布した際に散布ムラが発生しやすく、表層が薄く形成された部分に巣穴が発生するという問題が発生するためである。表層用原料混合物の固形分濃度を７１質量％以上とするのは、７１質量％より少ないと脱水する際に時間がかかり、脱水不良が部分的に生じるなどの問題が発生するためである。 And the process of manufacturing the raw material mixture for surface layers is performed by mixing the obtained wood flour, cement, silicic acid containing material, and wood fiber. The cement, the silicic acid-containing material, and the wood fiber may be added in a powder (dry) state or in a state containing water, but the solid content concentration of the surface layer raw material mixture is 71 to 71. Adjust to 90% by mass. The reason why the solid content concentration of the raw material mixture for the surface layer is 90% by mass or less is that when it exceeds 90% by mass, the respective raw materials are difficult to mix uniformly, and when sprayed, scattering unevenness tends to occur and the surface layer is formed thin. This is because a problem arises that a burrow is generated in the part. The reason why the solid content concentration of the raw material mixture for the surface layer is 71% by mass or more is that when it is less than 71% by mass, it takes time to dehydrate, and problems such as partial dehydration occur.
得られた表層用原料混合物を母層マットに散布し、成型、養生する工程は、得られた表層用原料混合物を母層マットに散布した後、凹凸模様を賦した型板でプレスし、その後、６０〜９０℃で５〜１０時間の条件で一次養生し、更に、自然養生、又は、蒸気養生、又は、オートクレーブ養生することにより行う。なお、プレスの際に、型板はマットの上、又は下に配置する。また、オートクレーブ養生する場合の条件は、１２０℃以上、０．５ＭＰa以上の圧力で７〜１５時間である。 The obtained surface layer raw material mixture is sprayed on the mother layer mat, molded, and cured. After the obtained surface layer raw material mixture is sprayed on the mother layer mat, it is pressed with a template with an uneven pattern, and then First curing is performed at 60 to 90 ° C. for 5 to 10 hours, and further, natural curing, steam curing, or autoclave curing is performed. During pressing, the template is placed on or below the mat. The conditions for curing the autoclave are 7 to 15 hours at a pressure of 120 ° C. or higher and 0.5 MPa or higher.
次に、本発明の実施例をあげる。 Next, examples of the present invention will be given.
間伐材を粉砕して得られた平均１．０mmのサイズの木粉と、硬化後の木質セメント板の不良板を粉砕して得られた平均粒径１００μｍのサイズの木質セメント板の粉砕品と、水を６０秒混合させた。なお、水は混合物の固形分濃度が８５％となるよう添加した。このようにして得られた混合物に、ポルトランドセメントと、珪石粉と、フライアッシュと、パーライトと、カナディアンフリーネス５００mlの針葉樹未晒しクラフトパルプと、故紙と、別の水を添加し、混合して表層用原料混合物を得た。また、ポルトランドセメントと、珪石粉と、フライアッシュと、パーライトと、カナディアンフリーネス５００mlの針葉樹未晒しクラフトパルプと、故紙と、硬化後の木質セメント板の不良板を粉砕して得られた平均粒径１００μｍのサイズの木質セメント板の粉砕品と、水を添加し、混合して母層用スラリーを得た。表層用原料混合物、母層用スラリーの各原料の割合は、表１に示すとおりであり、表層用原料混合物の固形分濃度は７５質量％で、母層用スラリーの固形分濃度は２５質量％とした。そして、得られた母層用スラリーを、下側に吸引脱水装置を備えた型枠内に流し込み、下側側から吸引脱水して、母層マットを製造し、該母層マットの上に表層用原料混合物を散布し、母層の表面に表層が形成された積層マットを製造した。更に、積層マットの表面に、凹凸模様を賦した型板を用いて、プレス圧２．５MPa、プレス時間７秒のプレスを施し、深さ４mmで角度が５５°のブロック柄を表面に形成させた。その後、１７０℃で、１０時間オートクレーブ養生し、実施例１の木質セメント板を得た。なお、表層用原料混合物と母層用スラリーの固形分は、１０：８０の質量比とした。 An average of 1.0 mm size wood powder obtained by pulverizing thinned wood, and a pulverized product of wood cement board having an average particle size of 100 μm obtained by pulverizing defective wood cement board after hardening The water was mixed for 60 seconds. Water was added so that the solid content concentration of the mixture was 85%. Portland cement, silica powder, fly ash, perlite, Canadian freeness 500 ml softwood unbleached kraft pulp, waste paper, and other water are added to the mixture thus obtained and mixed to obtain a surface layer. A raw material mixture was obtained. The average particle size obtained by crushing Portland cement, quartzite powder, fly ash, perlite, Canadian freeness untreated bleached kraft pulp, waste paper, and hardened wood cement board. A ground cement slurry of 100 μm in size and water were added and mixed to obtain a mother layer slurry. The ratio of each raw material of the raw material mixture for the surface layer and the slurry for the mother layer is as shown in Table 1, the solid content concentration of the raw material mixture for the surface layer is 75 mass%, and the solid content concentration of the slurry for the mother layer is 25 mass%. It was. Then, the obtained mother layer slurry is poured into a mold having a suction dewatering device on the lower side and sucked and dehydrated from the lower side to manufacture a mother layer mat, and a surface layer is formed on the mother layer mat. The raw material mixture was sprayed to produce a laminated mat having a surface layer formed on the surface of the mother layer. Furthermore, using a template with a concavo-convex pattern on the surface of the laminated mat, press with a press pressure of 2.5 MPa and a press time of 7 seconds to form a block pattern with a depth of 4 mm and an angle of 55 ° on the surface. It was. Then, autoclave curing was performed at 170 ° C. for 10 hours to obtain a wood cement board of Example 1. The solid content of the raw material mixture for the surface layer and the slurry for the mother layer was set to a mass ratio of 10:80.
表層用原料混合物の製造において、木粉の添加量を、表層用原料混合物の固形分に対して２質量％とし、木粉の増加分だけ故紙を減らし、他は実施例１と同じ条件として木質セメント板を製造し、実施例２の木質セメント板を得た。なお、木粉は全て最初に木質セメント板の粉砕品と混合しており、表層用原料混合物、母層用スラリーの各原料の割合は、表１に示すとおりであった。 In the production of the raw material mixture for the surface layer, the amount of added wood flour is 2% by mass with respect to the solid content of the raw material mixture for the surface layer, and the waste paper is reduced by the amount of increase in the wood powder. A cement board was manufactured to obtain a wood cement board of Example 2. The wood powder was first mixed with the pulverized product of the wood cement board, and the ratio of each raw material of the raw material mixture for the surface layer and the slurry for the mother layer was as shown in Table 1.
表層用原料混合物の製造において、木質セメント板の粉砕品の添加量を変更し、他は実施例１と同じ条件として木質セメント板を製造し、実施例３の木質セメント板を得た。表層用原料混合物、母層用スラリーの各原料の割合は、表１に示すとおりであった。なお、木質セメント板の粉砕品は全て木粉の次に水に添加した。 In the production of the raw material mixture for the surface layer, the addition amount of the pulverized product of the wood cement board was changed, and the wood cement board was produced under the same conditions as in Example 1 to obtain the wood cement board of Example 3. The ratio of each raw material of the raw material mixture for the surface layer and the slurry for the mother layer was as shown in Table 1. All pulverized wood cement boards were added to water after wood flour.
表層用原料混合物の製造において、硬化後の木質セメント板の不良板を、硬化前の木質セメント板の不良板に変更し、他は実施例１と同じ条件として木質セメント板を製造し、実施例４の木質セメント板を得た。なお、硬化前の木質セメント板の不良板も、平均粒径が１００μｍとなるよう粉砕して使用しており、表層用原料混合物、母層用スラリーの各原料の割合は、表１に示すとおりであった。 In the production of the raw material mixture for the surface layer, the defective board of the wooden cement board after hardening is changed to the defective board of the wooden cement board before hardening, and the wooden cement board is manufactured under the same conditions as in Example 1 except that Four wood cement boards were obtained. In addition, the defective board of the wood cement board before hardening is also pulverized so as to have an average particle size of 100 μm, and the ratio of each raw material of the raw material mixture for the surface layer and the slurry for the mother layer is as shown in Table 1. Met.
表層用原料混合物の製造において、木粉の添加量を、表層用原料混合物の固形分に対して２質量％となるように変更し、他は実施例４と同じ条件として木質セメント板を製造し、実施例５の木質セメント板を得た。なお、木粉は全て最初に木質セメント板の粉砕品と混合しており、表層用原料混合物、母層用スラリーの各原料の割合は、表１に示すとおりであった。 In the production of the surface layer raw material mixture, the amount of wood flour added was changed to 2% by mass with respect to the solid content of the surface layer raw material mixture, and the other conditions were the same as in Example 4 to produce a wood cement board. A wood cement board of Example 5 was obtained. The wood powder was first mixed with the pulverized product of the wood cement board, and the ratio of each raw material of the raw material mixture for the surface layer and the slurry for the mother layer was as shown in Table 1.
表層用原料混合物の製造において、木粉と木質セメント板の粉砕品を混合する際に添加する水に、スラリーを脱水した後の水を使用するように変更し、他は実施例１と同じ条件として木質セメント板を製造し、実施例６の木質セメント板を得た。なお、表層用原料混合物、母層用スラリーの各原料の割合は、表１に示すとおりであった。 In the production of the raw material mixture for the surface layer, the water added when mixing the pulverized product of wood powder and wood cement board was changed to use water after dewatering the slurry, and the other conditions were the same as in Example 1. The wood cement board was manufactured as Example 6 and the wood cement board of Example 6 was obtained. In addition, the ratio of each raw material of the raw material mixture for the surface layer and the slurry for the mother layer was as shown in Table 1.
表層用原料混合物の製造において、木粉の添加量を、表層用原料混合物の固形分に対して２質量％となるように変更し、他は実施例６と同じ条件として木質セメント板を製造し、実施例７の木質セメント板を得た。なお、表層用原料混合物、母層用スラリーの各原料の割合は、表１に示すとおりであった。 In the production of the surface layer raw material mixture, the amount of wood flour added was changed to 2% by mass with respect to the solid content of the surface layer raw material mixture, and the other conditions were the same as in Example 6 to produce a wood cement board. A wood cement board of Example 7 was obtained. In addition, the ratio of each raw material of the raw material mixture for the surface layer and the slurry for the mother layer was as shown in Table 1.
表層用原料混合物の製造において、木粉と該木粉の倍の量のポルトランドセメントと水を添加し、６０秒混合した。なお、固形分濃度は８５質量％とした。次に、硬化後の木質セメント板の不良板を粉砕して得られた、平均粒径が１００μｍの木質セメント板の粉砕品と、ポルトランドセメントと、珪石粉と、フライアッシュと、パーライトと、カナディアンフリーネス５００mlの針葉樹未晒しクラフトパルプと、故紙と、別の水を添加し、混合して表層用原料混合物を得た。すなわち、ポルトランドセメントは、木粉とともに添加するとともに、珪石粉等と混合する際にも更に添加した。他は実施例１と同じ条件で木質セメント板を製造し、実施例８の木質セメント板を得た。なお、表層用原料混合物、母層用スラリーの各原料の割合は、表１に示すとおりであった。 In the production of the raw material mixture for the surface layer, wood powder, twice the amount of Portland cement and water, and water were added and mixed for 60 seconds. In addition, solid content concentration was 85 mass%. Next, pulverized wood cement board with an average particle diameter of 100 μm, Portland cement, silica powder, fly ash, perlite, Canadian, obtained by pulverizing the defective wooden cement board after hardening. Freeness 500 ml of softwood unbleached kraft pulp, waste paper, and other water were added and mixed to obtain a raw material mixture for the surface layer. That is, the Portland cement was added together with the wood powder, and further added when mixing with the silica powder and the like. Otherwise, a wood cement board was produced under the same conditions as in Example 1 to obtain a wood cement board of Example 8. In addition, the ratio of each raw material of the raw material mixture for the surface layer and the slurry for the mother layer was as shown in Table 1.
ポルトランドセメントと、珪石粉と、フライアッシュと、パーライトと、カナディアンフリーネス５００mlの針葉樹未晒しクラフトパルプと、故紙と、硬化後の木質セメント板の粉砕品と、水を添加し、混合して、木粉を含まない表層用原料混合物を得た。他は実施例１と同じ条件で木質セメント板を製造し、比較例１の木質セメント板を得た。なお、表層用原料混合物、母層用スラリーの各原料の割合は、表１に示すとおりであった。 Portland cement, silica powder, fly ash, perlite, Canadian freeness 500 ml softwood unbleached kraft pulp, waste paper, ground wood cement board after hardening, water added, mixed, wood A raw material mixture for the surface layer containing no powder was obtained. Others produced the wood cement board on the same conditions as Example 1, and obtained the wood cement board of the comparative example 1. FIG. In addition, the ratio of each raw material of the raw material mixture for the surface layer and the slurry for the mother layer was as shown in Table 1.
表層用原料混合物の製造において、全ての原料を同時に混合した以外は実施例１と同じ条件で木質セメント板を製造し、比較例２の木質セメント板を得た。なお、表層用原料混合物、母層用スラリーの各原料の割合は、表１に示すとおりであった。 In the production of the raw material mixture for the surface layer, a wood cement board was produced under the same conditions as in Example 1 except that all the raw materials were mixed at the same time to obtain a wood cement board of Comparative Example 2. In addition, the ratio of each raw material of the raw material mixture for the surface layer and the slurry for the mother layer was as shown in Table 1.
表層用原料混合物の製造において、木粉の添加量を表層用原料混合物の固形分に対して２質量％とし、木粉の増加分だけ故紙を減らした以外は比較例２と同じ条件で木質セメント板を製造し、比較例３の木質セメント板を得た。なお、表層用原料混合物、母層用スラリーの各原料の割合は、表１に示すとおりであった。 In the production of the raw material mixture for the surface layer, the amount of wood powder added was 2% by mass with respect to the solid content of the raw material mixture for the surface layer, and the amount of wood waste was reduced by the amount of increase in the wood powder. A board was produced to obtain a wood cement board of Comparative Example 3. In addition, the ratio of each raw material of the raw material mixture for the surface layer and the slurry for the mother layer was as shown in Table 1.
表層用原料混合物の製造において、木粉と木質セメント板の粉砕品を含む混合物の固形分濃度を９２質量％となるように変更した以外は実施例２と同じ条件で木質セメント板を製造し、比較例４の木質セメント板を得た。なお、表層用原料混合物、母層用スラリーの各原料の割合は、表１に示すとおりであった。 In the production of the raw material mixture for the surface layer, a wood cement board is produced under the same conditions as in Example 2 except that the solid content concentration of the mixture containing the pulverized product of wood powder and wood cement board is changed to 92% by mass, A wood cement board of Comparative Example 4 was obtained. In addition, the ratio of each raw material of the raw material mixture for the surface layer and the slurry for the mother layer was as shown in Table 1.
表層用原料混合物の製造において、木粉のサイズを平均２．０mmに変更した以外は実施例２と同じ条件で木質セメント板を製造し、比較例５の木質セメント板を得た。なお、表層用原料混合物、母層用スラリーの各原料の割合は、表１に示すとおりであった。 In the production of the raw material mixture for the surface layer, a wood cement board was produced under the same conditions as in Example 2 except that the size of the wood powder was changed to an average of 2.0 mm, and a wood cement board of Comparative Example 5 was obtained. In addition, the ratio of each raw material of the raw material mixture for the surface layer and the slurry for the mother layer was as shown in Table 1.
そして、得られた実施例１〜８、及び比較例１〜５の各木質セメント板について、比重、厚さ、曲げ強度、長期耐久性を測定するとともに、各木質セメント板の表面の造形性を確認したので、その結果も表１に示す。なお、曲げ強度はＪＩＳ Ａ １４０８に準じて測定した。長期耐久性は、３０cm角の木質セメント板の端部を水に４時間侵漬した後、二酸化炭素を充満させた密閉容器内に４時間置き、その後、１６時間８０℃で乾燥させることを１サイクルとし、１０サイクル行った後の木質セメント板の状況を確認して、反りが０．５mm未満の場合には”○”とし、０．５〜１．０mmの場合には”△”とし、１．０mm以上の反りが発生した場合は”×”と評価した。表面の造形性は、各木質セメント板の表面に形成されたブロック柄の状態を確認し、亀裂が存在しない場合には”○”とし、亀裂が存在する場合は”×”と評価した。 And about each obtained wood cement board of Examples 1-8 and Comparative Examples 1-5, while measuring specific gravity, thickness, bending strength, and long-term durability, the formability of the surface of each wood cement board is measured. Since it confirmed, the result is also shown in Table 1. The bending strength was measured according to JIS A 1408. For long-term durability, the end of a 30 cm square wood cement board is immersed in water for 4 hours, then placed in a closed container filled with carbon dioxide for 4 hours, and then dried at 80 ° C. for 16 hours. Check the condition of the wood cement board after 10 cycles, and if the warp is less than 0.5mm, it will be "○", if it is 0.5-1.0mm, "△" When warping of 1.0 mm or more occurred, it was evaluated as “x”. As for the surface formability, the state of the block pattern formed on the surface of each wood cement board was confirmed, and when there was no crack, it was evaluated as “◯”, and when there was a crack, it was evaluated as “×”.
実施例１〜８の木質セメント板は、曲げ強度に優れるとともに、長期耐久性と表面の造形性が”○”であり、長期耐久性と表面の造形性に優れた。
一方、表層に木粉を含有していない比較例１の木質セメント板は、長期耐久性と表面の造形性が”△”であり、長期耐久性と表面の造形性に劣った。
表層用原料混合物の製造において、木粉を添加した後、すぐに他の原料を添加した比較例２の木質セメント板は、同じ配合の実施例１の木質セメント板よりも曲げ強度が低く、かつ、長期耐久性と表面の造形性が”×”であり、長期耐久性と表面の造形性に劣った。この傾向は、木粉の添加量を全固形分に対して２質量％となるように変更した比較例３でも同じであった。すなわち、比較例３の木質セメント板は、同じ配合の実施例２よりも曲げ強度が低く、かつ、長期耐久性と表面の造形性が”×”であり、長期耐久性と表面の造形性に劣った。
表層用原料混合物の製造において、木粉と木質セメント板の粉砕品を混合する工程の固形分濃度を９２質量％とした比較例４の木質セメント板は、同じ配合の実施例２よりも曲げ強度が低く、かつ、長期耐久性と表面の造形性が”×”であり、長期耐久性と表面の造形性に劣った。
表層の木粉のサイズが平均２．０mmである比較例５の木質セメント板は、同じ配合の実施例２よりも曲げ強度が低く、かつ、長期耐久性と表面の造形性が”×”であり、長期耐久性と表面の造形性に劣った。
The wood cement boards of Examples 1 to 8 were excellent in bending strength, long-term durability and surface formability were “◯”, and were excellent in long-term durability and surface formability.
On the other hand, the wood cement board of Comparative Example 1 which does not contain wood powder in the surface layer has long-term durability and surface formability of “Δ”, and is inferior in long-term durability and surface formability.
In the production of the raw material mixture for the surface layer, the wood cement board of Comparative Example 2 in which other raw materials were added immediately after addition of wood flour had lower bending strength than the wood cement board of Example 1 having the same composition, and The long-term durability and surface formability were “x”, and the long-term durability and surface formability were inferior. This tendency was the same in Comparative Example 3 in which the amount of wood flour added was changed to 2% by mass with respect to the total solid content. That is, the wood cement board of Comparative Example 3 has lower bending strength than that of Example 2 of the same composition, and the long-term durability and surface formability are “x”, and the long-term durability and surface formability are improved. inferior.
In the production of the raw material mixture for the surface layer, the wood cement board of Comparative Example 4 in which the solid content concentration in the step of mixing the pulverized product of wood powder and wood cement board was 92% by mass was higher in flexural strength than Example 2 of the same composition. The long-term durability and surface formability were “x”, and the long-term durability and surface formability were inferior.
The wood cement board of Comparative Example 5 having an average surface powder size of 2.0 mm has a bending strength lower than that of Example 2 of the same composition, and long-term durability and surface formability are “x”. Yes, long-term durability and surface formability were poor.
以上に本発明の一実施形態について説明したが、本発明はこれに限定されず、特許請求の範囲に記載の発明の範囲において種々の変形態を取り得る。 Although one embodiment of the present invention has been described above, the present invention is not limited thereto, and various modifications can be made within the scope of the invention described in the claims.
以上説明したように、本発明によれば、表面の意匠性と、曲げ強度と、長期耐久性に優れる木質セメント板、及びその製造方法を提供することができる。 As described above, according to the present invention, it is possible to provide a wooden cement board excellent in surface design, bending strength, and long-term durability, and a method for producing the same.
Claims (8)
セメントと、珪酸含有物質と、木質繊維とからなる母層の上に、セメントと、珪酸含有物質と、木質繊維と、木粉とからなる表層が積層した成型物であり、
母層と表層には、セメントと珪酸含有物が３：７〜７：３の質量比で含有されており、
表層の木粉は０．３〜１．５mmで、カルシウムにより被覆されており、
木質繊維と木粉とをあわせた含有量は、木質セメント板の全固形分に対して９質量％以下である
ことを特徴とする木質セメント板。 A wood cement board having a concavo-convex pattern on the surface,
It is a molded product in which a surface layer composed of cement, silicic acid-containing material, wood fiber, and wood powder is laminated on a mother layer composed of cement, silicic acid-containing material, and wood fiber,
The mother layer and the surface layer contain cement and silicic acid-containing material in a mass ratio of 3: 7 to 7: 3,
The surface layer of wood flour is 0.3-1.5mm and is covered with calcium,
The wood cement board characterized in that the total content of wood fiber and wood powder is 9% by mass or less based on the total solid content of the wood cement board.
前記木粉の含有量は、表層の全固形分に対して１〜３質量％である
ことを特徴とする木質セメント板。 The wood cement board according to claim 1,
Content of the said wood powder is 1-3 mass% with respect to the total solid of a surface layer. The wood cement board characterized by the above-mentioned.
得られたスラリーを脱水し、母層マットを製造する工程と、
木粉をカルシウムで被覆する工程と、
得られた木粉と、セメントと、珪酸含有物と、木質繊維を混合して表層用原料混合物を製造する工程と、
得られた表層用原料混合物を母層マットに散布し、成型、養生する工程とからなり、
母層用スラリーを製造する工程において、該母層用スラリーにおけるセメントと珪酸含有物の質量比を３：７〜７：３とするとともに、木質繊維の量を該母層用スラリーの全固形分に対して９質量％以下とし、
表層用原料混合物を製造する工程において、該表層用原料混合物におけるセメントと珪酸含有物の質量比を３：７〜７：３とするとともに、木質繊維と木粉とをあわせた量を該表層用原料混合物の全固形分に対して９質量％以下とし、
木粉をカルシウムで被覆する工程は、０．３〜１．５mmの木粉とセメント組成物の粉砕物を固形分濃度７５〜９０質量％の状態で混合することにより行う
ことを特徴とする木質セメント板の製造方法。 Adding water, cement, silicic acid-containing substance, and wood fiber, and mixing to produce a slurry for the mother layer;
Dehydrating the obtained slurry and producing a mother layer mat;
Coating the wood flour with calcium;
A step of producing a raw material mixture for the surface layer by mixing the obtained wood powder, cement, silicic acid-containing material, and wood fiber;
Sprinkling the obtained raw material mixture for the surface layer on the mother layer mat, molding, curing process,
In the step of producing the slurry for the mother layer, the mass ratio of the cement and the silicic acid-containing material in the slurry for the mother layer is set to 3: 7 to 7: 3, and the amount of the wood fiber is set to the total solid content of the slurry for the mother layer. 9 mass% or less based on
In the step of producing the raw material mixture for the surface layer, the mass ratio of the cement and the silicic acid-containing material in the raw material mixture for the surface layer is set to 3: 7 to 7: 3, and the combined amount of the wood fiber and the wood flour is used for the surface layer 9 mass% or less based on the total solid content of the raw material mixture,
The step of coating wood powder with calcium is performed by mixing 0.3 to 1.5 mm wood powder and a pulverized cement composition in a solid content concentration of 75 to 90% by mass. Cement board manufacturing method.
得られたスラリーを脱水し、母層マットを製造する工程と、
木粉をカルシウムで被覆する工程と、
得られた木粉と、セメントと、珪酸含有物と、木質繊維を混合して表層用原料混合物を製造する工程と、
得られた表層用原料混合物を母層マットに散布し、成型、養生する工程とからなり、
母層用スラリーを製造する工程において、該母層用スラリーにおけるセメントと珪酸含有物の質量比を３：７〜７：３とするとともに、木質繊維の量を該母層用スラリーの全固形分に対して９質量％以下とし、
表層用原料混合物を製造する工程において、該表層用原料混合物におけるセメントと珪酸含有物の質量比を３：７〜７：３とするとともに、木質繊維と木粉とをあわせた量を該表層用原料混合物の全固形分に対して９質量％以下とし、
木粉をカルシウムで被覆する工程は、０．３〜１．５mmの木粉を、セメント、石膏、石灰、カルシウムを含有する珪酸含有物のすくなくともいずれかであるカルシウム含有物と固形分濃度７５〜９０質量％の状態で混合することにより行う
ことを特徴とする木質セメント板の製造方法。 Adding water, cement, silicic acid-containing substance, and wood fiber, and mixing to produce a slurry for the mother layer;
Dehydrating the obtained slurry and producing a mother layer mat;
Coating the wood flour with calcium;
A step of producing a raw material mixture for the surface layer by mixing the obtained wood powder, cement, silicic acid-containing material, and wood fiber;
Sprinkling the obtained raw material mixture for the surface layer on the mother layer mat, molding, curing process,
In the step of producing the slurry for the mother layer, the mass ratio of the cement and the silicic acid-containing material in the slurry for the mother layer is set to 3: 7 to 7: 3, and the amount of the wood fiber is set to the total solid content of the slurry for the mother layer. 9 mass% or less based on
In the step of producing the raw material mixture for the surface layer, the mass ratio of the cement and the silicic acid-containing material in the raw material mixture for the surface layer is set to 3: 7 to 7: 3, and the combined amount of the wood fiber and the wood flour is used for the surface layer 9 mass% or less based on the total solid content of the raw material mixture,
The step of coating the wood flour with calcium is performed by adding 0.3 to 1.5 mm of wood flour to at least one of a calcium-containing material containing cement, gypsum, lime and calcium and a solid content concentration of 75 to A method for producing a wood cement board, comprising mixing in a state of 90% by mass.
前記木粉の量を、表層用原料混合物の全固形分に対して１〜３質量％とする
ことを特徴とする木質セメント板の製造方法。 A method for producing a wood cement board according to claim 3 or 4,
The amount of the said wood powder shall be 1-3 mass% with respect to the total solid of the raw material mixture for surface layers. The manufacturing method of the wood cement board characterized by the above-mentioned.
前記木粉をカルシウムで被覆する工程において、該木粉と前記セメント組成物の粉砕物の質量比を１：７〜１：２０とする
ことを特徴とする木質セメント板の製造方法。 A method for producing a wood cement board according to claim 3,
In the step of coating the wood powder with calcium, the mass ratio of the wood powder and the pulverized product of the cement composition is 1: 7 to 1:20.
前記セメント組成物が木質セメント板である
ことを特徴とする木質セメント板の製造方法。 A method for producing a wood cement board according to claim 3,
The method for producing a wood cement board, wherein the cement composition is a wood cement board.
前記木粉をカルシウムで被覆する工程において、前記カルシウム含有物の量を該木粉の量よりも多くする
ことを特徴とする木質セメント板の製造方法。 A method for producing a wood cement board according to claim 4,
In the step of coating the wood powder with calcium, the amount of the calcium-containing material is made larger than the amount of the wood powder.
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| RU2775678C2 (en) * | 2017-09-30 | 2022-07-06 | Нитиха Корпорейшн | Building material and method for manufacture of building material |
| CN114804777A (en) * | 2022-05-23 | 2022-07-29 | 张家口广建新材料有限公司 | Lightweight core-pulling foam concrete inner partition board and preparation method thereof |
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| JP2001139363A (en) * | 1999-09-03 | 2001-05-22 | Nichiha Corp | Cemented wooden board |
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| JPH08175861A (en) * | 1994-12-22 | 1996-07-09 | Nichiha Corp | Formed plate of inorganic material and its production |
| JPH09255397A (en) * | 1996-03-25 | 1997-09-30 | Mokushitsu Fukugou Zairyo Gijutsu Kenkyu Kumiai | Cement formed body material and its production and producing of cement formed body |
| JP2001139363A (en) * | 1999-09-03 | 2001-05-22 | Nichiha Corp | Cemented wooden board |
| JP2002187759A (en) * | 2000-12-21 | 2002-07-05 | Nichiha Corp | Production process for cemented wood board |
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| WO2019065167A1 (en) * | 2017-09-30 | 2019-04-04 | ニチハ株式会社 | Building material and method for manufacturing building material |
| JP2019064166A (en) * | 2017-09-30 | 2019-04-25 | ニチハ株式会社 | Building material, and method for producing building material |
| CN110418702A (en) * | 2017-09-30 | 2019-11-05 | 日吉华株式会社 | The manufacturing method of building materials and building materials |
| RU2775678C2 (en) * | 2017-09-30 | 2022-07-06 | Нитиха Корпорейшн | Building material and method for manufacture of building material |
| US11504880B2 (en) | 2017-09-30 | 2022-11-22 | Nichiha Corporation | Building material and method for manufacturing building material |
| JP7197261B2 (en) | 2017-09-30 | 2022-12-27 | ニチハ株式会社 | Wood-based cement board and its manufacturing method |
| CN114804777A (en) * | 2022-05-23 | 2022-07-29 | 张家口广建新材料有限公司 | Lightweight core-pulling foam concrete inner partition board and preparation method thereof |
| CN114804777B (en) * | 2022-05-23 | 2023-03-07 | 张家口广建新材料有限公司 | Lightweight core-pulling foam concrete inner partition board and preparation method thereof |
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